Transmission Terminal, Program, Image Display Method and Transmission System

1. A transmission terminal for connection with other transmission terminals via relay apparatuses, comprising: display image determination processing circuitry configured to, for a case where a change of a layout in a display screen page generated when a conference is started is detected, determine sets of image data or display data to be displayed; base name acquisition processing circuitry configured to acquire, from a base name management table where base names are associated with corresponding terminal information, base names associated with terminal information of the transmission terminals corresponding to the sets of the image data or the display data that have been determined to be displayed; arrangement information management table updating processing circuitry configured to determine areas for which sets of the image data or the display data that have been determined to be displayed are displayed, and to update an arrangement information management table where transmission data information that indicates whether each of the sets of the image data or the display data that have been determined to be displayed is image data or display data, the terminal information and the base names are associated with the areas; data type determination processing circuitry configured to determine whether each of the sets of the image data or the display data that have been determined to be displayed corresponding to the areas registered with the arrangement information management table is display data, based on the transmission data information; base name synthesizing processing circuitry configured to read the base names that include base names associated with the terminal information or the transmission data information transmitted together with the sets of the image data or the display data from the relay apparatuses, and to synthesize the base names with the sets of the image data or the display data that have been determined to be displayed corresponding to the areas; and image display control processing circuitry configured to, based on the arrangement information management table, determine the areas of the sets of the image data or the display data that have been determined to be displayed with which the base names are synthesized, and arrange the areas according to the change of the layout to display the display screen page, wherein: sets of image data are sets of data that indicate images photographed by transmission terminals, and sets of display data are sets of material data that are displayed on external displays, and the image display control processing circuitry is further configured to synthesize base names with a plurality of sets of the image data or the display data that have been determined to be displayed for a case where the plurality of sets of image data or display data are displayed, and not to synthesize a base name with a single set of display data that has been determined to be displayed for a case where only the single set of display data is displayed.

2. The transmission terminal according to claim 1 , wherein: as the terminal information, terminal information of the transmission terminal transmitting the image data or the display data is registered; as the transmission data information, identification information of data transmitted by the relay apparatus including the type of the image data or the display data is registered; and as the area, identification of the area is registered.

3. A method of communicating between a transmission terminal and other transmission terminals via relay apparatuses, comprising: determining sets of image data or display data to be displayed, for a case where a change of a layout in a display screen page generated when a conference is started is detected; acquiring, from a base name management table where base names are associated with corresponding terminal information, base names associated with terminal information of the transmission terminals corresponding to the sets of the image data or the display data that have been determined to be displayed; determining areas for which sets of the image data or the display data that have been determined to be displayed are displayed, and updating an arrangement information management table where transmission data information that indicates whether each of the sets of the image data or the display data that have been determined to be displayed is image data or display data, the terminal information and the base names are associated with the areas; determining whether each of the sets of the image data or the display data that have been determined to be displayed corresponding to the areas registered with the arrangement information management table is display data, based on the transmission data information; reading the base names that include base names associated with the terminal information or the transmission data information transmitted together with the sets of the image data or the display data from the relay apparatuses, and synthesizing the base names with the sets of the image data or the display data that have been determined to be displayed corresponding to the areas; and determining the areas of the sets of the image data or the display data that have been determined to be displayed with which the names are synthesized, and arranging the areas according to the change of the layout to display the display screen page, based on the arrangement information management table, wherein: sets of image data are sets of data that indicate images photographed by transmission terminals, and sets of display data are sets of material data that are displayed on external displays, and the determining the areas of the sets further includes synthesizing base names with a plurality of sets of the image data or the display data that have been determined to be displayed for a case where the plurality of sets of image data or display data are displayed, and not to synthesize a base name with a single set of display data that has been determined to be displayed for a case where only the single set of display data is displayed.

4. The method according to claim 3 , wherein: as the terminal information, terminal information of the transmission terminal transmitting the image data or the display data is registered; as the transmission data information, identification information of data transmitted by the relay apparatus including the type of the image data or the display data is registered; and as the area, identification of the area is registered.